/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:34:03,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:34:03,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:34:03,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:34:03,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:34:03,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:34:03,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:34:03,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:34:03,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:34:03,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:34:03,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:34:03,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:34:03,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:34:03,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:34:03,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:34:03,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:34:03,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:34:03,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:34:03,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:34:03,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:34:03,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:34:03,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:34:03,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:34:03,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:34:03,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:34:03,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:34:03,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:34:03,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:34:03,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:34:03,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 03:34:03,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:34:03,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:34:03,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:34:03,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:34:03,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:34:03,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:34:03,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:34:03,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:34:03,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:34:03,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:34:03,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:34:03,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 03:34:03,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:34:03,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:34:03,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:34:03,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:34:03,639 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:34:03,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:34:03,639 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:34:03,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:34:03,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:34:03,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:34:03,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:34:03,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:34:03,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:34:03,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:34:03,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:34:03,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:34:03,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:34:03,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:34:03,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:34:03,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:34:03,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:34:03,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:34:03,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:34:03,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:34:03,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:34:03,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:34:03,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:34:03,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:34:03,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:34:03,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:34:03,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:34:03,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:34:04,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:34:04,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:34:04,005 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:34:04,005 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-19 03:34:04,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e5733742/2f5098134034437d86ca80512f5f5c1d/FLAG974770d7f [2020-08-19 03:34:04,566 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:34:04,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-19 03:34:04,574 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e5733742/2f5098134034437d86ca80512f5f5c1d/FLAG974770d7f [2020-08-19 03:34:04,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e5733742/2f5098134034437d86ca80512f5f5c1d [2020-08-19 03:34:04,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:34:04,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:34:04,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:34:04,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:34:04,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:34:04,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:34:04" (1/1) ... [2020-08-19 03:34:05,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af3cb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:04, skipping insertion in model container [2020-08-19 03:34:05,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:34:04" (1/1) ... [2020-08-19 03:34:05,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:34:05,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:34:05,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:34:05,229 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:34:05,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:34:05,264 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:34:05,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05 WrapperNode [2020-08-19 03:34:05,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:34:05,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:34:05,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:34:05,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:34:05,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... [2020-08-19 03:34:05,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:34:05,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:34:05,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:34:05,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:34:05,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:34:05,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:34:05,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:34:05,465 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 03:34:05,465 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-19 03:34:05,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:34:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 03:34:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:34:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 03:34:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-19 03:34:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:34:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:34:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:34:05,674 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:34:05,674 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 03:34:05,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:34:05 BoogieIcfgContainer [2020-08-19 03:34:05,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:34:05,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:34:05,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:34:05,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:34:05,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:34:04" (1/3) ... [2020-08-19 03:34:05,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c20a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:34:05, skipping insertion in model container [2020-08-19 03:34:05,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:05" (2/3) ... [2020-08-19 03:34:05,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c20a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:34:05, skipping insertion in model container [2020-08-19 03:34:05,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:34:05" (3/3) ... [2020-08-19 03:34:05,687 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-19 03:34:05,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:34:05,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:34:05,715 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:34:05,753 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:34:05,754 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:34:05,754 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:34:05,754 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:34:05,754 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:34:05,754 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:34:05,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:34:05,756 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:34:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-19 03:34:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 03:34:05,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:05,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:05,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-19 03:34:05,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:05,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548120294] [2020-08-19 03:34:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:34:06,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548120294] [2020-08-19 03:34:06,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:34:06,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:34:06,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204975770] [2020-08-19 03:34:06,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:34:06,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:34:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:06,156 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-19 03:34:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:06,219 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-19 03:34:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:34:06,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 03:34:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:06,234 INFO L225 Difference]: With dead ends: 40 [2020-08-19 03:34:06,235 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 03:34:06,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 03:34:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 03:34:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 03:34:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 03:34:06,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-19 03:34:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:06,291 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 03:34:06,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:34:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 03:34:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 03:34:06,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:06,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:06,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:34:06,294 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-19 03:34:06,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:06,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818444242] [2020-08-19 03:34:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:34:06,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818444242] [2020-08-19 03:34:06,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:34:06,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:34:06,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566635388] [2020-08-19 03:34:06,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:34:06,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:06,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:34:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:06,478 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-19 03:34:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:06,512 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-19 03:34:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:34:06,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 03:34:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:06,515 INFO L225 Difference]: With dead ends: 32 [2020-08-19 03:34:06,515 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 03:34:06,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:06,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 03:34:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-19 03:34:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 03:34:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 03:34:06,524 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-19 03:34:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:06,525 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 03:34:06,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:34:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 03:34:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 03:34:06,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:06,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:06,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:34:06,527 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-19 03:34:06,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:06,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493102729] [2020-08-19 03:34:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:34:06,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493102729] [2020-08-19 03:34:06,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:34:06,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 03:34:06,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946628941] [2020-08-19 03:34:06,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:34:06,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:06,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:34:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:34:06,722 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-19 03:34:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:06,794 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 03:34:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 03:34:06,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-19 03:34:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:06,796 INFO L225 Difference]: With dead ends: 48 [2020-08-19 03:34:06,796 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 03:34:06,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:34:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 03:34:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 03:34:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 03:34:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-19 03:34:06,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-19 03:34:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:06,807 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-19 03:34:06,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:34:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-19 03:34:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:34:06,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:06,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:06,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:34:06,810 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-19 03:34:06,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:06,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060293462] [2020-08-19 03:34:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:06,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 03:34:07,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060293462] [2020-08-19 03:34:07,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:34:07,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:34:07,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467091708] [2020-08-19 03:34:07,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:34:07,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:34:07,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:07,032 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-19 03:34:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:07,074 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-19 03:34:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:34:07,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-19 03:34:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:07,076 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:34:07,076 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 03:34:07,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:34:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 03:34:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-19 03:34:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 03:34:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-19 03:34:07,085 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-19 03:34:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:07,085 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-19 03:34:07,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:34:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-19 03:34:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:34:07,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:07,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:07,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:34:07,088 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-19 03:34:07,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:07,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077433164] [2020-08-19 03:34:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 03:34:07,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077433164] [2020-08-19 03:34:07,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:34:07,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 03:34:07,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805245692] [2020-08-19 03:34:07,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 03:34:07,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:07,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 03:34:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 03:34:07,376 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-19 03:34:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:07,489 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-19 03:34:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 03:34:07,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-19 03:34:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:07,491 INFO L225 Difference]: With dead ends: 64 [2020-08-19 03:34:07,491 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 03:34:07,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-19 03:34:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 03:34:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-19 03:34:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 03:34:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-19 03:34:07,500 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-19 03:34:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:07,501 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-19 03:34:07,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 03:34:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-19 03:34:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 03:34:07,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:07,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:07,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:34:07,503 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:07,503 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-19 03:34:07,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:07,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055659846] [2020-08-19 03:34:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 03:34:07,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055659846] [2020-08-19 03:34:07,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:34:07,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 03:34:07,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567922923] [2020-08-19 03:34:07,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 03:34:07,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 03:34:07,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-19 03:34:07,794 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-19 03:34:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:07,955 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-19 03:34:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 03:34:07,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-19 03:34:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:07,958 INFO L225 Difference]: With dead ends: 72 [2020-08-19 03:34:07,958 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 03:34:07,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-19 03:34:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 03:34:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-19 03:34:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 03:34:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-19 03:34:07,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-19 03:34:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:07,967 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-19 03:34:07,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 03:34:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-19 03:34:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 03:34:07,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:07,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:07,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:34:07,970 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:07,970 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-19 03:34:07,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:07,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477347952] [2020-08-19 03:34:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-19 03:34:08,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477347952] [2020-08-19 03:34:08,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:34:08,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 03:34:08,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179843080] [2020-08-19 03:34:08,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 03:34:08,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 03:34:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 03:34:08,338 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-19 03:34:08,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:08,547 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-19 03:34:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 03:34:08,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-19 03:34:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:08,552 INFO L225 Difference]: With dead ends: 80 [2020-08-19 03:34:08,552 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 03:34:08,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-19 03:34:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 03:34:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-19 03:34:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 03:34:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 03:34:08,560 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-19 03:34:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:08,561 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 03:34:08,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 03:34:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 03:34:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 03:34:08,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:08,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:08,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:34:08,565 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-19 03:34:08,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:08,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835204005] [2020-08-19 03:34:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 03:34:09,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835204005] [2020-08-19 03:34:09,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:34:09,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 03:34:09,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592761231] [2020-08-19 03:34:09,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 03:34:09,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 03:34:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 03:34:09,014 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-19 03:34:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:09,291 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-19 03:34:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 03:34:09,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-19 03:34:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:09,294 INFO L225 Difference]: With dead ends: 90 [2020-08-19 03:34:09,294 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 03:34:09,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:34:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 03:34:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-19 03:34:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 03:34:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-19 03:34:09,303 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-19 03:34:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:09,304 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-19 03:34:09,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 03:34:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-19 03:34:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 03:34:09,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:09,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:09,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:34:09,306 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:09,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-19 03:34:09,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:09,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781239239] [2020-08-19 03:34:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-19 03:34:09,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781239239] [2020-08-19 03:34:09,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:34:09,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 03:34:09,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226325591] [2020-08-19 03:34:09,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 03:34:09,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 03:34:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 03:34:09,823 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-19 03:34:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:10,106 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-19 03:34:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 03:34:10,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-19 03:34:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:10,108 INFO L225 Difference]: With dead ends: 94 [2020-08-19 03:34:10,108 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 03:34:10,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:34:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 03:34:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-19 03:34:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 03:34:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-19 03:34:10,127 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-19 03:34:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:10,128 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-19 03:34:10,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 03:34:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-19 03:34:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 03:34:10,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:34:10,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:34:10,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:34:10,130 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:34:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:34:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-19 03:34:10,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:34:10,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869264610] [2020-08-19 03:34:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:34:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:34:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 03:34:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:34:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:34:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-19 03:34:10,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869264610] [2020-08-19 03:34:10,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:34:10,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 03:34:10,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391162087] [2020-08-19 03:34:10,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 03:34:10,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:34:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 03:34:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 03:34:10,781 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-19 03:34:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:34:11,042 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-19 03:34:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 03:34:11,043 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-19 03:34:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:34:11,044 INFO L225 Difference]: With dead ends: 82 [2020-08-19 03:34:11,044 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 03:34:11,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:34:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 03:34:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 03:34:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 03:34:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 03:34:11,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-19 03:34:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:34:11,047 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 03:34:11,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 03:34:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 03:34:11,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 03:34:11,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:34:11,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 03:34:11,072 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 03:34:11,072 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:34:11,072 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-19 03:34:11,073 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-19 03:34:11,073 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-19 03:34:11,073 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-19 03:34:11,073 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-19 03:34:11,073 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-19 03:34:11,073 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-19 03:34:11,073 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:34:11,074 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 03:34:11,074 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 03:34:11,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 03:34:11,074 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-19 03:34:11,074 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-19 03:34:11,074 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-19 03:34:11,075 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-19 03:34:11,075 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-19 03:34:11,075 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-19 03:34:11,075 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-19 03:34:11,075 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-19 03:34:11,075 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-19 03:34:11,075 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-19 03:34:11,076 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-19 03:34:11,076 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-19 03:34:11,076 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 03:34:11,076 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-19 03:34:11,076 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-19 03:34:11,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:34:11 BoogieIcfgContainer [2020-08-19 03:34:11,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:34:11,085 INFO L168 Benchmark]: Toolchain (without parser) took 6094.35 ms. Allocated memory was 142.6 MB in the beginning and 280.5 MB in the end (delta: 137.9 MB). Free memory was 102.3 MB in the beginning and 192.1 MB in the end (delta: -89.8 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-08-19 03:34:11,086 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 03:34:11,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.54 ms. Allocated memory is still 142.6 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-19 03:34:11,088 INFO L168 Benchmark]: Boogie Preprocessor took 131.51 ms. Allocated memory was 142.6 MB in the beginning and 203.4 MB in the end (delta: 60.8 MB). Free memory was 92.2 MB in the beginning and 182.1 MB in the end (delta: -89.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-19 03:34:11,089 INFO L168 Benchmark]: RCFGBuilder took 280.82 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-19 03:34:11,089 INFO L168 Benchmark]: TraceAbstraction took 5402.95 ms. Allocated memory was 203.4 MB in the beginning and 280.5 MB in the end (delta: 77.1 MB). Free memory was 169.5 MB in the beginning and 192.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 54.5 MB. Max. memory is 7.1 GB. [2020-08-19 03:34:11,093 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.54 ms. Allocated memory is still 142.6 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.51 ms. Allocated memory was 142.6 MB in the beginning and 203.4 MB in the end (delta: 60.8 MB). Free memory was 92.2 MB in the beginning and 182.1 MB in the end (delta: -89.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.82 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5402.95 ms. Allocated memory was 203.4 MB in the beginning and 280.5 MB in the end (delta: 77.1 MB). Free memory was 169.5 MB in the beginning and 192.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 54.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 58 SDslu, 3296 SDs, 0 SdLazy, 1115 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 50267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 118/206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...